Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2013

Balance Sheet Components [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

The following is the activity in the allowance for uncollectible accounts (in millions):

	Years Ended December 31,
	2013			2012			2011
Balance as of beginning of year	$	5		$	6		$	5
Increase in provision	6			6			11
Amounts written off, less recoveries	(5		)	(7		)	(10		)
Balance as of end of year	$	6		$	5		$	6

Investments held in trust [Table Text Block]

The trusts are comprised of the following investments as of December 31 (in millions):

	Nuclear     Decommissioning Trust				Non-Qualified Benefit     Plan Trust
	2013		2012		2013		2012
Cash equivalents	$	59	$	15	$	—	$	2
Marketable securities, at fair value:
Equity securities	—		—		8		5
Debt securities	23		23		1		2
Insurance contracts, at cash surrender value	—		—		26		23
	$	82	$	38	$	35	$	32

Schedule of Other Assets and Other Liabilities [Table Text Block]

Other current assets and Accrued expenses and other current liabilities consist of the following (in millions):

	As of December 31,
	2013		2012
Other current assets:
Current deferred income tax asset	$	42	$	51
Prepaid expenses	38		37
Assets from price risk management activities	13		4
Other	1		1
	$	94	$	93
Accrued expenses and other current liabilities:
Accrued employee compensation and benefits	$	46	$	46
Accrued interest payable	23		23
Dividends payable	22		21
Accrued taxes payable	21		21
Regulatory liabilities—current	1		12
Other	58		56
	$	171	$	179